Pretty good. With well in excess of a million km driven, a valid driving license (something which no software product so far has been able to achieve), zero alcohol, zero drugs and no smartphone to distract me while driving. I see driving as a 'full time occupation'. My vehicle(s) (and that includes by bikes) are kept in tip-top condition, no expense spared, I'm fully aware that it isn't just my life that's on the line. I also have a standing order to my eldest that he is to shred my driving license when I turn 70 no matter how much I protest, and that's only 14 years away.
I'm all for self driving cars and I believe they are the future. I also believe they will be a decade or more in the coming and that we need at least one more level-up before AI sofware/hardware combos are solid enough that your typical self-driving solution will outperform an experienced driver.
Neither is 71, 72, 73, 74 and so on, and then one day you really were too old to drive. In a country where driving is a necessity there is no way around this so you get a lot of people driving who really shouldn't be. To play it safe I've set the limit at 70 for myself because I think that if I don't put a hard line down I will always think 'one more year'. This avoids the gray area entirely, exactly because 70 isn't too old to drive.
I know a 62 year old that shouldn't drive. And I know a 76 year old that is fine. It really depends upon the person, but our dmv isn't fit to detect this.